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The BAI calculator allows you to calculate the fat percentage in your body. It is a new alternative to Body Mass Index (BMI) calculation.

To calculate your Body Adiposity Index, enter your height, hip circumference, age and gender in the BAI calculator. The BAI calculator then calculates how high your body fat percentage is.

### Formula of Body Adiposity Index (BAI)

BAI = ( HC / (HM)1.5 ) – 18
• BAI = Body Adiposity Index
• HC = Hip Circumference in Centimeter
• c – HM = Height in Meter

#### BAI Classifications for Men

Age (years) Underweight Healthy Overweight Obese
20 – 39 Less than 8% 8% to 21% 21% to 26% Greater than 26%
40 – 59 Less than 11% 11% to 23% 23% to 29% Greater than 29%
60 – 79 Less than 13% 13% to 25% 25% to 31% Greater than 31%

#### BAI Classifications for Women

Age (years) Underweight Healthy Overweight Obese
20 – 39 Less than21% 21% to 33% 33% to 39% Greater than 39%
40 – 59 Less than 23% 23% to 35% 35% to 41% Greater than 41%
60 – 79 Less than 25% 25% to 38% 38% to 43% Greater than 43%

To estimate the body fat percentage (KFA) of a person, there are various calculation tools. Widely used is the calculation with the help of a method developed by the US Navy (to the KFA calculator according to US Navy method). Here, neck circumference, waist circumference and hip circumference are used for the calculation.

The Body Adiposity Index (BAI) does not take your weight into account when assessing your physique, but instead puts your hip circumference in relation to your age, height and gender. This is to estimate the body fat content.

As an alternative to the Body Mass Index (BMI), American researchers have developed another formula: the Body Adiposity Index (BAI). The idea behind it is to design a calculation that uses only your height and hip circumference as parameters.

Probably the most important advantage of the BAI over the BMI is that you don't have to provide a weight, which makes it possible to determine a measurement even in situations or places where a bathroom scale is not available.

Another advantage of the Body Adiposity Index is that it approximates body fat percentage, whereas the widely used BMI is of limited accuracy and gives different values for men and women with similar body fat percentage.

Limitations of the BAI

In 2012, a more detailed study on the Body Adiposity Index concluded that estimates of body fat percentage based on BAI do not provide a more accurate indication of overweight than those based on BMI, waist-to-hip ratio (WHR), or waist-to-height ratio (WHtR).

Obesity indices that include waist circumference (e.g., the WHtR recommended by Fettrechner.de) are more appropriate than BAI and BMI in assessing health risks.

### Importend Notes and Disclaimer

Caveats and Recommendations: This calculator is NOT intended to diagnose illness or be used as a substitute for medical advice or treatment. Some models provide predictive outcomes which may not be accurate. Please consult a medical professional for any medical treatment or diagnosis advice.

Note: This calculator is presented for your own personal use and is to be used as a guide only. Medical and other decisions should NOT be based on the results of this calculator. Although this calculator has been tested, we cannot guarantee the accuracy of its calculations or results.

Disclaimer: This calculator is provided without warranty and CANNOT be used to diagnose or treat any disease or condition.

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